Manual spray apparatus
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates generally to the field of agricultural liquid spray apparatus, and more particularly, is directed to a portable system including a manually operated dynamo suitable to function a rotary spray head and auxiliary equipment to facilitate the manual application of liquid agricultural chemicals in an efficient manner. 
     2. Discussion of the Prior Art 
     Mechanisms to aid in the application of liquid and granular agricultural chemicals to gardens, fields and other surface areas have long been a popular subject matter for prior workers in the art. Numerous types of mechanical devices have been developed to spread the agricultural chemicals and these devices have been both manually and mechanically operated. More recently, the apparatus and equipment has tended to be quite complicated in nature and expensive in manufacture and operation. Most presently available types of spray apparatus have been designed for use with various types of vehicles including aircraft and such known equipment has proven to be both efficient and effective to relatively uniformly apply the desired chemicals. 
     Agricultural chemical application equipment has also been particularly designed for manual use by an individual and it is in this particular area that the present invention finds special utility. For example, in U.S. Pat. No. 3,648,935 by the inventor of the present invention, a spray apparatus with a rotary movable head has been disclosed. In the apparatus described in U.S. Pat. No. 3,648,935, the movable spray head is rotatively powered through apparatus including ground contacting wheels so that as the apparatus is moved over the ground surface, the wheels generate rotary forces sufficient to rotate the rotary spray head. In other applications, the rotary spray head has been removed from the ground contacting apparatus and has instead been equipped with a small electric motor. Upon equipping the small motor with a suitable battery or batteries, a worker can walk over the ground surface while spraying and the electric motor will provide the rotary energy necessary to turn the spray head for agricultural chemical application purposes. 
     Such manually carried, battery powered spray apparatus has become quite popular in relatively backward or third world countries and has been widely distributed by one agricultural chemical manufacturer under the trademark &#34;HERBIE&#34;. While this device has proved to be highly effective in such areas and efficient when in use, it has been found by farm and plantation operators in third world countries that the &#34;HERBIE&#34; type apparatus is frequently out-of-service and inoperable due to battery run down and the lack of a convenient source of supply for replacement batteries. In addition to the loss of battery power due to the usual and proper use of the apparatus, it has developed that the agricultural farm workers in such areas have a tendency to use the batteries for other purposes, such as for portable radios and the like. Accordingly, when it comes time to work, the spray apparatus frequently cannot function due to the lack of suitable battery power. 
     SUMMARY OF THE INVENTION 
     The present invention relates generally to manual agricultural chemical spray apparatus, and more particularly, is directed to a completely self-contained spray system that will enable a farm worker in a third world country to manually generate sufficient power for spray head rotation as the worker progresses through the fields on foot. 
     The manual spray apparatus of the present invention comprises generally a rotary spray head which is driven by a small electric motor in known manner. A small, manual, light weight dynamo or generator is provided in a manner to be comfortably worn by the worker wherein the output from the dynamo can be fed directly to the spray head motor to thereby rotate the spray head under all conditions of use when the dynamo is operated. 
     Additionally, the output of the dynamo is calculated to be sufficient to simultaneously feed a transmitter or similar apparatus whereby radio signals can be automatically generated at all times when the dynamo is in operation. A plantation owner or farm boss can be equipped with a compatible radio receiver to receive the radio signals transmitted by each manual spray system to thereby readily monitor the operation and output of each of the workers in the field. 
     In accordance with the teachings of this invention, a &#34;HERBIE&#34; type spray head can be affixed at the end of a suitable applicator handle to facilitate aiming or placement of the rotary spray head as the worker proceeds through the fields. The worker, in known manner will carry a liquid chemical containing tank on his back. A gravity outlet is provided from the tank to the spray head whereby the liquid agricultural chemical will flow by gravity to the spray head for application in a rotary pattern in known manner when the spray head is operated. A suitable small dynamo or generator with manual handle is equipped with straps for affixing to the waist or other portion of the body of the worker. In this manner, the worker can easily rotate the dynamo crank or handle with one hand as he walks while the spray head itself can be directed by the worker&#39;s other hand as he progresses through the field to be sprayed. A small radio transmitter of known design receives power from the dynamo and continuously emits a coded signal to thereby continuously indicate that the dynamo crank is being turned and that the worker is progressing through the fields. When the worker stops for a rest, the dynamo handle will not be turned and consequently the radio signal will be interrupted. If desired, other small electrical appliances, for example, lamps could also be provided and connected to the dynamo output. In this manner, electric lighting facilities can be provided in out of the way areas which might not otherwise have electric lighting capability during evening hours when the spray equipment would not ordinarily be in use. The lamp or lamps could also be utilized to provide sufficient light to permit night spraying. 
     It is therefore an object of the present invention to provide an improved manual agricultural spray apparatus of the type set forth. 
     It is another object of the present invention to provide a novel manual spray apparatus comprising an electric motor powered spray head and a small, portable, hand operated dynamo that is capable of supplying sufficient electric power to rotate the spray head as a worker proceeds through the field. 
     It is another object of the present invention to provide a novel, manual agricultural spray apparatus comprising a motor operated spray head, a hand operated dynamo supplying electric energy for the spray head motor, a radio transmitter drawing its energy requirements from the dynamo output and a radio receiver to receive the radio signal from the radio transmitter. 
     It is another object of the present invention to provide a novel manual spray apparatus that is rugged in construction, inexpensive in manufacture and trouble free when in use. 
     Other objects and a fuller understanding of the invention will be had by referring to the following detailed description when considered in connection with the accompanying drawings wherein like reference characters are used to designate similar parts throughout. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view showing a worker using the manual spray apparatus of the present invention. 
     FIG. 2 is a perspective drawing, partially schematic, showing the details of construction of the manual spray apparatus and partly broken away to expose interior construction details. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION 
     Although specific terms are used in the following description for the sake of clarity, these terms are intended to refer only to the particular structure of the invention selected for illustration in the drawings, and are not intended to define or limit the scope of the invention. 
     Referring now to the drawings, there is shown in FIG. 1 the manual agricultural spray apparatus 10 of the present invention in use by an agricultural field worker 12. In well known manner, the spray apparatus 10 may be of the &#34;HERBIE&#34; type and comprises a rotary spray head 14 which is rotatably driven by a directly connected, small electric motor 16. The spray head 14 may be affixed at the end of a suitable elongated handle 18 to permit accurate application of the liquid agricultural chemical (not shown) to the ground surface by the worker using one hand, for example, his left hand 20. A liquid chemical containing tank or reservoir 22 can be carried by the worker 12 in known manner, for example, by securing the tank or reservoir 22 upon his back by employing usual straps 24 or other known types of reservoir attaching facilities. A flexible conduit 26 communicates between the bottom of the tank or reservoir 22 and the spray head 14 to provide a continuous gravity flow of liquid agricultural chemical (not illustrated) for spraying at all times when the spray head 14 is being rotated by the motor 16. 
     As illustrated, a hand operated generator or dynamo 28 is provided as part of the spray apparatus and can be conveniently secured to the worker in any comfortable, known manner, for example, by employing an adjustable belt 30. The generator or dynamo system 28 comprises a simple enclosure or gear box 32 having a speed increasing gear train therewithin and a manual crank or handle 34 to rotate the gears of the gear train in a controlled and deliberate manner. The output of the gear train 66, 67, 68 (FIG. 2) in turn is connected to a small output dynamo 36 of size suitable to provide sufficient power to energize the electric motor 16 to rotate the spray head 14. 
     Inasmuch as only small quantities of electrical energy will be required to function the motor 16 and the spray head 14, the dynamo 36 can conveniently be a previously known and manufactured item, such as a usual bicycle generator which has long been designed and employed for use with bicycles to energize such low power requirement equipment as a bicycle lamp. The output of the bicycle type dynamo 36 should match the power input requirements of the spray head motor 16 so that the electrical energy supplied will rotate the spray head 14. The generator or dynamo 36 can be connected to the gear train output in known manner whereby there is considerable mechanical advantage between the input provided by the right hand 38 of the worker 12 as he rotates the crank or handle 34 while walking through the field. The slow rotative speed of the crank 34 as turned by the hand 38 of the worker 12 will be increased through the gear train to an output speed sufficient to efficiently function the generator or dynamo system 28. Accordingly, when the worker 12 proceeds along his assigned route, by rotating the crank or handle 34, sufficient quantities of energy can be generated at the dynamo 36 to rotate the spray head 14 to thereby cause the desired spraying operation to proceed. When the crank is not turned, then there will be no output from the dynamo or generator 36 and the spray head 14 will not be rotated. 
     A pair of wires 40, 42 interconnect the generator 36 output with the input to the electric motor 16 in known manner and sufficient length of wire is provided so as not to interfere with the placement and positioning of the spray head 14 as the worker 12 proceeds through the fields. If desired, the wires 40, 42 can be affixed either interiorly or exteriorly to the spray head elongated handle 18 to protect the wires and to minimize the chances of mechanical injury to the wires. 
     Referring now to FIG. 2 and additionally considering FIG. 1, it will be seen that the output from the dynamo 36 can be utilized to function additional types of electrically powered apparatus. In one alternate construction, a large lamp 70 could be connected to the dynamo output by wires 72, 74 whereby sufficient light could be produced by the lamp 70 to illuminate portions of the field to be sprayed to enable the spray apparatus 10 to be utilized after dark for nighttime spraying. In the embodiment illustrated, a small radio transmitter 44 is powered by the dynamo 36 and is connected to the dynamo output through usual electrical wires 46, 48 to develop a continuously transmitted radio signal in well known manner. Preferably, the signal generated by the transmitter 44 can be coded in known manner so that a single, common receiver 50 of known construction can pick up and distinguish the coded signals generated by a plurality of working transmitters. In this manner, the radio signals of a number of transmitters 44 which may be positioned in various parts of a plantation or field, depending upon the chore assigned to each of a number of workers can be received, discriminated and easily identified. 
     The receiver 50 can be of well known suitable design and comprises essentially an antenna 52 of known design suitable to receive radio signals emitted through the antenna 56 of the transmitter 44. The generated radio signals are received in the receiver 50 at a discriminator 54 of known type wherein the discriminator functions to distinguish between the variously coded incoming signals. The discriminator 54 feeds the information to a plurality of monitors 58, 60, etc. in known manner. In turn, each monitor output can be connected individually to one of a plurality of known type indicators or annunicators 62, 64, etc. whereby a single foreman or plantation owner can immediately determine when some or all of the field workers are no longer generating electricity and so can no longer be spraying their assigned fields. While only two monitors 58, 60 and only two annunciators 62, 64 are illustrated, it will be appreciated that any number of similar monitors and annunicators can be added in well known manner to accommodate and receive the transmitted radio signals generated by any number of field workers. 
     If desired, additional power take offs can be provided at the dynamo 36 to power other small pieces of electrical apparatus, for example lamps, transistor radios, etc. All that would be required would be to attach additional wires 72, 74 to the dynamo output and so long as the dynamo was designed of sufficient capacity, all of the attached electrical apparatus could be simultaneously functioned. Alternately, in remote areas, in the evenings after work hours, the spray head motor 16 and the transmitter 44 could be disconnected from the dynamo outlet and the worker could then have a ready source of small electrical current supply to power small items such as lights 70, transistor radios and other small electric appliances requiring minimum electric input. 
     Although the invention has been described with a certain degree of particularity, it is understood that the present disclosure has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention. Thus, the scope of the invention should not be limited by the foregoing specification, but rather, only by the scope of the claims appended hereto.